Sec Form 4 Filing - LEWIS CHARLES P @ EXELON CORP - 2003-09-26

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person LEWIS CHARLES P 2. Issuer Name and Ticker or Trading Symbol EXELON CORP [ EXC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) X __ Other (specify below) Exec. Officer through 09/23 (Last) (First) (Middle) 10 SOUTH DEARBORN STREET, 37TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 09/26/2003 (Street) CHICAGO, IL60603 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 09/26/2003 F 333( 1 ) D $ 62.64 6,980( 2 ) D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Deferred Comp. - Phantom Shares $ 0( 3 ) 08/08/1988 08/08/1988 Common Stock 231 231( 3 ) D NQ Stock Options: 02/27/1995 $ 26.13 ( 4 ) ( 4 ) Common Stock 2,500 2,500 D NQ Stock Options: 02/26/1996 $ 28.25 ( 4 ) ( 4 ) Common Stock 2,500 2,500 D NQ Stock Options: 02/23/1999 $ 37.69 ( 4 ) ( 4 ) Common Stock 4,000 4,000 D NQ Stock Options: 10/23/1999 $ 37.5 ( 4 ) ( 4 ) Common Stock 10,000 10,000 D NQ Stock Options: 02/29/2000 $ 37.31 ( 4 ) ( 4 ) Common Stock 8,300 8,300 D NQ Stock Options: 10/20/2000 $ 59.5 ( 4 ) ( 4 ) Common Stock 12,000 12,000 D NQ Stock Options: 01/28/2002 $ 49.62 ( 4 ) ( 4 ) Common Stock 18,000 18,000 D NQ Stock Options: 01/27/2003 $ 49.61 ( 5 ) ( 5 ) Common Stock 8,500 8,500 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other LEWIS CHARLES P 10 SOUTH DEARBORN STREET 37TH FLOOR CHICAGO, IL60603 Exec. Officer through 09/23 Signatures Scott N. Peters, Attorney in Fact for Charles P. Lewis 09/30/2003 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On 09/26/2003, 1,099 restricted shares vested and were transferred to direct ownership net of shares withheld for taxes. ( 2 )Includes 187 shares acquired on 03/10/2003, 06/10/2003, and 09/10/2003 through the automatic dividend reinvestment feature of Exelon plans. ( 3 )Phantom shares held as of 09/26/03 in a multi-fund deferred compensation account to be settled for cash on a 1:1 basis upon the reporting person's termination of employment for any reason. Shares are acquired through regular periodic payroll contributions and the reinvestment of dividends. ( 4 )NQ stock options vest in 1/3 increments beginning on the first anniversary of the grant date (referenced in column 1) and expire on the tenth anniversary of the grant date. ( 5 )NQ stock options vest in 1/4 increments beginning on the first anniversary of the grant date (referenced in column 1) and expire on the tenth anniversary of the grant date.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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